sugar-toolkit-gtk3/shell/view/frame/clipboardbox.py

201 lines
7.3 KiB
Python
Raw Normal View History

import logging
import hippo
import gtk
from sugar import util
from sugar.graphics import style
from view.clipboardicon import ClipboardIcon
from sugar.clipboard import clipboardservice
class _ContextMap:
"""Maps a drag context to the clipboard object involved in the dragging."""
def __init__(self):
self._context_map = {}
def add_context(self, context, object_id, data_types):
"""Establishes the mapping. data_types will serve us for reference-
counting this mapping.
"""
self._context_map[context] = [object_id, data_types]
def get_object_id(self, context):
"""Retrieves the object_id associated with context.
Will release the association when this function was called as many times
as the number of data_types that this clipboard object contains.
"""
[object_id, data_types_left] = self._context_map[context]
data_types_left = data_types_left - 1
if data_types_left == 0:
del self._context_map[context]
else:
self._context_map[context] = [object_id, data_types_left]
return object_id
def has_context(self, context):
return context in self._context_map
class ClipboardBox(hippo.CanvasBox):
def __init__(self, menu_shell):
hippo.CanvasBox.__init__(self)
self._menu_shell = menu_shell
self._icons = {}
self._context_map = _ContextMap()
self._pressed_button = None
self._press_start_x = None
self._press_start_y = None
cb_service = clipboardservice.get_instance()
cb_service.connect('object-added', self._object_added_cb)
cb_service.connect('object-deleted', self._object_deleted_cb)
cb_service.connect('object-state-changed', self._object_state_changed_cb)
def _get_icon_at_coords(self, x, y):
for object_id, icon in self._icons.iteritems():
[icon_x, icon_y] = self.get_position(icon)
[icon_width, icon_height] = icon.get_allocation()
if (x >= icon_x ) and (x <= icon_x + icon_width) and \
(y >= icon_y ) and (y <= icon_y + icon_height):
return icon
return None
def _add_selection(self, object_id, selection):
if selection.data:
logging.debug('ClipboardBox: adding type ' + selection.type + '.')
cb_service = clipboardservice.get_instance()
cb_service.add_object_format(object_id,
selection.type,
selection.data,
on_disk = False)
def _object_added_cb(self, cb_service, object_id, name):
icon = ClipboardIcon(self._menu_shell, object_id, name)
style.apply_stylesheet(icon, 'frame.BuddyIcon')
self.append(icon)
self._icons[object_id] = icon
logging.debug('ClipboardBox: ' + object_id + ' was added.')
def _object_deleted_cb(self, cb_service, object_id):
icon = self._icons[object_id]
self.remove(icon)
del self._icons[object_id]
logging.debug('ClipboardBox: ' + object_id + ' was deleted.')
def _object_state_changed_cb(self, cb_service, object_id, name, percent,
icon_name, preview):
icon = self._icons[object_id]
icon.set_state(name, percent, icon_name, preview)
logging.debug('ClipboardBox: ' + object_id + ' state was changed.')
def drag_motion_cb(self, widget, context, x, y, time):
logging.debug('ClipboardBox._drag_motion_cb')
context.drag_status(gtk.gdk.ACTION_COPY, time)
return True
def drag_drop_cb(self, widget, context, x, y, time):
logging.debug('ClipboardBox._drag_drop_cb')
object_id = util.unique_id()
self._context_map.add_context(context, object_id, len(context.targets))
cb_service = clipboardservice.get_instance()
cb_service.add_object(object_id, name="")
for target in context.targets:
if str(target) not in ('TIMESTAMP', 'TARGETS', 'MULTIPLE'):
widget.drag_get_data(context, target, time)
cb_service.set_object_percent(object_id, percent = 100)
return True
def drag_data_received_cb(self, widget, context, x, y, selection, targetType, time):
logging.debug('ClipboardBox: got data for target ' + selection.target)
if selection:
object_id = self._context_map.get_object_id(context)
self._add_selection(object_id, selection)
else:
logging.warn('ClipboardBox: empty selection for target ' + selection.target)
# If it's the last target to be processed, finish the dnd transaction
if not self._context_map.has_context(context):
context.finish(True, False, time)
def drag_data_get_cb(self, widget, context, selection, targetType, eventTime):
logging.debug("drag_data_get_cb: requested target " + selection.target)
object_id = self._last_clicked_icon.get_object_id()
cb_service = clipboardservice.get_instance()
data = cb_service.get_object_data(object_id, selection.target)
selection.set(selection.target, 8, data)
def button_press_event_cb(self, widget, event):
logging.debug("button_press_event_cb")
if event.button == 1 and event.type == gtk.gdk.BUTTON_PRESS:
self._last_clicked_icon = self._get_icon_at_coords(event.x, event.y)
if self._last_clicked_icon:
self._pressed_button = event.button
self._press_start_x = event.x
self._press_start_y = event.y
return True;
def motion_notify_event_cb(self, widget, event):
2006-12-14 13:50:42 +01:00
if not self._pressed_button:
return True
2006-12-14 13:50:42 +01:00
# if the mouse button is not pressed, no drag should occurr
if not event.state & gtk.gdk.BUTTON1_MASK:
self._pressed_button = None
return True
logging.debug("motion_notify_event_cb")
if event.is_hint:
x, y, state = event.window.get_pointer()
else:
x = event.x
y = event.y
state = event.state
2006-12-14 13:50:42 +01:00
if widget.drag_check_threshold(int(self._press_start_x),
int(self._press_start_y),
int(x),
int(y)):
targets = self._get_targets_for_dnd(
self._last_clicked_icon.get_object_id())
context = widget.drag_begin(targets,
gtk.gdk.ACTION_COPY,
1,
event);
return True
def drag_end_cb(self, widget, drag_context):
logging.debug("drag_end_cb")
self._pressed_button = None
def _get_targets_for_dnd(self, object_id):
cb_service = clipboardservice.get_instance()
(name, percent, icon, preview, format_types) = \
cb_service.get_object(object_id)
targets = []
for format_type in format_types:
targets.append((format_type, 0, 0))
logging.debug(str(targets))
return targets